Question: What has been the ister city of Changchun since Aug 25th, 1992?
Paraphrase: Since Aug. 25th, 1992 this has been the ister city of Changchun?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q92161 p:P190 ?s . ?s ps:P190 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1992')) }